<!--
 * Copyright © 2022 XXXXXXXXX
 * @Author: zhangxiang
 * @Date: 2022-06-06 15:03:23
 * @LastEditors: zhangxiang
 * @LastEditTime: 2023-02-07 15:28:59
 * @Description:
 *
-->

<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
        <span
          v-if="item.redirect === 'noRedirect' || index == levelList.length - 1"
          class="no-redirect"
        >{{ titleMenuName(item.meta) }}</span>
        <a v-else @click.prevent="handleLink(item)">{{ titleMenuName(item.meta) }}</a>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
import pathToRegexp from 'path-to-regexp'

export default {
  data() {
    return {
      levelList: null // 层级
    }
  },
  computed: {
    titleMenuName(meta) {
      return function(meta) {
        const menuName = this.$store.state.app.menuName
        if (Object.prototype.hasOwnProperty.call(menuName, meta.menuNameKey)) {
          return menuName[meta.menuNameKey].menuValue || meta.title
        }
        return meta.title
      }
    }
  },
  watch: {
    /**
     * @description: 监听路由
     * @return {*}
     */
    $route() {
      this.getBreadcrumb() // 获取Breadcrumb
    }
  },
  created() {
    this.getBreadcrumb() // 获取Breadcrumb
  },
  methods: {
    /**
     * @description: 获取Breadcrumb
     * @return {*}
     */
    getBreadcrumb() {
      // only show routes with meta.title
      const matched = this.$route.matched.filter(
        (item) => item.meta && item.meta.title
      )
      // const first = matched[0]

      // if (!this.isDashboard(first)) {
      //   matched = [{ path: '/dashboard', meta: { title: 'Dashboard' }}].concat(matched)
      // }

      this.levelList = matched.filter(
        (item) => item.meta && item.meta.title && item.meta.breadcrumb !== false
      )
    },
    /**
     * @description: 是否 Dashboard
     * @param {*} route
     * @return {*}
     */
    isDashboard(route) {
      const name = route && route.name
      if (!name) {
        return false
      }
      return name.trim().toLocaleLowerCase() === 'Dashboard'.toLocaleLowerCase()
    },
    /**
     * @description: 路径compile
     * @param {*} path
     * @return {*}
     */
    pathCompile(path) {
      // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
      const { params } = this.$route
      var toPath = pathToRegexp.compile(path)
      return toPath(params)
    },
    /**
     * @description: 处理链接
     * @param {*} item
     * @return {*}
     */
    handleLink(item) {
      const { redirect, path } = item
      if (redirect) {
        this.$router.push(redirect)
        return
      }
      this.$router.push(this.pathCompile(path))
    }
  }
}
</script>

<style lang="scss" scoped>
.app-breadcrumb.el-breadcrumb {
  display: inline-block;
  font-size: 14px;
  line-height: 50px;
  margin-left: 8px;

  .no-redirect {
    color: #97a8be;
    cursor: text;
  }
}
</style>
